This project provides the design and analysis of a circular patch antenna which works in the two working bands of Wi-Fi Technology (standard 802.11n). S11 parameter would be less than -10 dB in these bands, and not more than -8 dB. It´s necessary to cover low frequency band (2.41-2.48 GHz) and at least one of the two sub-bands in high frequency band (5.15-5.35 GHz or 5.42-5.72 GHz). The idea is t ...
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This project provides the design and analysis of a circular patch antenna which works in the two working bands of Wi-Fi Technology (standard 802.11n). S11 parameter would be less than -10 dB in these bands, and not more than -8 dB. It´s necessary to cover low frequency band (2.41-2.48 GHz) and at least one of the two sub-bands in high frequency band (5.15-5.35 GHz or 5.42-5.72 GHz). The idea is to include this antenna as the unitary element of an array or to use it to feed an Electromagnetic Band Gap (EBG) superstrate technology antenna. Two models with two resonant patches in each of them have been designed. The first model, contains the two patches in the same substrate, each one will have their own feed by coaxial wires and one of them (the one which works in the low band) have two slots that leads to an extra resonance that would work in all of the bandwidth (5.15-5.35 GHz) and comply the complete range for Wi-Fi technology. The second design includes a pair of stacked patches and double substrate. In this design both of the patches (the one which resonate at the low band and the other which resonant in the high one) don’t have any kind of slots and there is only one feeding point (coaxial wire). This design fulfils the objectives for the low band but it doesn’t comply completely the higher one (it’s just comply the objectives for the half of the low sub-band, 5.15-5.25 GHz). However by a deeper optimization process it should comply the whole specification. Last but not least, has been simulated array radiation patterns and the results have been rather favorable, although grating lobes appeared, being more important in the high frequencies. However both designs are valid to a point-to-point Wi-Fi communication. [--]